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单词 盖膜
例句 DEFINITIVE EXAMPLES 权威例句〔foramen〕An opening or orifice, as in a bone or in the covering of the ovule of a plant.孔:如骨头或食物的覆盖膜上的小口或通气口美国传统〔indusium〕An enclosing membrane, as that covering the sorus of a fern.囊群盖:一种包裹其它物的膜,如蕨类植物的孢囊群的覆盖膜美国传统〔micropyle〕Zoology A pore in the membrane covering the ovum of some animals through which a spermatozoon can enter.【动物学】 卵膜孔:一些动物卵细胞覆盖膜上的小孔,精子可由此进入美国传统
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